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Share-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 30, 2014
Disclosure Share Based Compensation Additional Information [Abstract]  
Unrecognized compensation cost related to unvested share-based equity awards $ 85,029
Weighted average period of recognition of unvested share-based equity awards 1 year 7 months 20 days
Unrecognized compensation cost related to unvested share-based equity awards, stock options 47,461
Unrecognized compensation cost related to unvested share-based equity awards, restricted stock $ 37,568